Arrange the following compounds in the increasing order of their boiling points :
`CH_3CH_2CH_2 CHO ,CH_3 CH_2 CH_2 CH_2 OH , C_2 H_5 -O-C_2 H_5 ,CH_3 CH_2 CH_2 CH_2 CH_3`

Explanation

To arrange the given compounds in increasing order of their boiling points, we need to consider the types of intermolecular forces present in each compound. The compounds given are:

1. **n-Butanal (CH₃CH₂CH₂CHO)** - an aldehyde
2. **n-Butanol (CH₃CH₂CH₂CH₂OH)** - an alcohol
3. **Diethyl ether (C₂H₅-O-C₂H₅)** - an ether
4. **n-Pentane (CH₃CH₂CH₂CH₂CH₃)** - an alkane

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